releases info:
https://wiki.yoctoproject.org/wiki/Releases


This is how these sources were downloaded:

20170513 Pyro released
----------------------
# git clone -b pyro git://git.openembedded.org/openembedded-core openembedded-core --depth 1
# git clone -b pyro git://git.openembedded.org/meta-openembedded meta-openembedded --depth 1
# git clone -b '1.34' git://git.openembedded.org/bitbake bitbake --depth 1
# git clone git://github.com/OSSystems/meta-browser.git meta-browser --depth 1
# git clone git://github.com/schnitzeltony/meta-office.git meta-office --depth 1

20170531 Raspberry Pi
---------------------
ref: 
https://layers.openembedded.org/layerindex/branch/master/layer/meta-raspberrypi/
d/l:
# git clone git://git.yoctoproject.org/meta-raspberrypi meta-raspberrypi --depth 1


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The utility 'dir2tgz' can be used to make folders into tarballs.
Note, this utility is in all Puppy Linux and derivatives.
Note, I removed the .git folder from each before making into tarball.
